Club Díospóireachta
Tá club díospóireachta oscailte do chách sa scoil chun scileanna cumarsáide agus labhartha a fheabhsú. Feabhsaíonn daltaí a gcumas oibre i ngrúpaí agus feabhsaíonn siad a gcuid tuairimí agus conas na tuairimí sin a chuir in iúl. Is slí iontach é seo chun do chuid Gaeilge a fhorbairt agus muinín a fhái ó thaobh an chaint phoiblí de. Bíonn GCM in iomaíocht i gComórtas Uí Chadhain - Comórtas eagraithe ag Gael-Linn le haghaidh Gaelcholáistí agus scoileanna Gaeltachta. Tá comórtas le haghaidh daltaí ag léibhéal Sóisearach - Bliain 1/2/3 agus comórtas eile le haghaidh daltaí Sinsearacha IB/5/6. Baineadh Craobh Laighean amach go minic thar na blianta agus shroicheamar Craobh na hÉireann faoi thrí. Ina theannta sin, bhuaigh an scoil Craobh na hÉireann in 2023.
Bíonn Leas-Phríomhoide Eibhlín i bhfeighil ar an bhfoireann díospóireachta agus bíonn cruinniú eagraithe ag tús gach bliain chun na foirne a eagrú.
Debating Club
The debating club is open to everyone in the school and aims to improve communication and speaking skills. Students develop their ability to work in groups and improve how they form their opinions and express them.
This is an excellent way to develop your Irish and build confidence in public speaking. GCM competes in Comórtas Uí Chadhain, a competition organised by Gael-Linn for Gaelcholáistí and Gaeltacht schools. There is a competition for junior students — 1st, 2nd and 3rd Year — and another competition for senior students — TY, 5th Year and 6th Year.
GCM has won the Leinster Championship many times over the years and has reached the All-Ireland Final three times. In addition, the school won the All-Ireland Championship in 2023.
Deputy Principal Eibhlín is in charge of the debating team, and a meeting is organised at the beginning of each year to set up the teams.